Machine for turning wood heels



March 5, 1929. N. L. GULLIFORD MACHINE FOR TURNING WOOD HEELS Filed Nov. 19, 1925 3 Sheets-Sheet 1 fiu'enlarz Lu. *v will W 38mm March 5, 1929. N. L. GULLIFORD IACHINE FOR TURNING WOOD HEELS Filed NOV. 19, 1925 3 Sheets-sheet 2 March 5, 1929. GULLIFQVRD 1,704,319

IACHINB FOR TURNING WOOD HEELS Filed Nov. 19, 1925 3 Sheets-Sheet 3 Patented Mar. 5, 1929 um'reo STATES PATENT OFFICE.

NICHOLAS L. GULLIFOBD, F LYNN, MASSACHUSETTS, ASSIGNOB TO GREGORY l mun GOHRANY, OF LYNN, MASSACHUSETTS, A CORPORATION 01' IASSACHUSETTB.

momma roa resume woon anus. Application tiled November 19, 1925. Serial No. 70,177.

The present invention relates to machines In the accompanying drawings illustratfor turning wood heels and more particuing the preferred form of the invention, larly to work holders adapted for embodi- 1g. 1 is a side elevation of a wood heel nient therein. turning machine embodying the features of 5 The object of the present invention is to the invention;

improve machines of this general character Fig. 2 is a detail showing a front elevain a manner to simplify and facilitate the tion of the jack illustrated in Fig. 1; insertion and removal of the work while Fi 3 is a detail illustrating a section on at the same time rigidly clamping the work the line of Fig. 2;

l in operative relation to the cutter member. Fig. 4 is a detail illustrating a section on It will be obvious to those skilled in the the line 4-4 of Fig. 2; art, that in the manufacture of wood heels Fig. 5 is a detai illustrating a section on several separate and distinct operations are the line 5-5 of Fig. 4; and performed upon the heel block, including the Fig. 6 is a plan view of the machine shown 15 grooving of the breast portion, the turning in Fig. 1. A

of the sides and back, and the formation of The machine shown in the illustrated emthe heel seat concavity. During these sevbodiment of. the invention comprises a frame eral operations the partially finished heel 1 having two upright cutter spindles 2, block must be rigidly clamped in operative journaled in suitable hearings in the ma- 20 relation to the cutter member. In ordinary chine frame and carrying the cutters 3 at practice the clamping of the heel' block in their upper ends. The spindles are rotat position is a tedious and relat vely slow opcontinuously throu h the usual pulleys (not eration which materially limits the output shown) located a jacent their lower ends. of the machine. According to the present The machine frame 1 is provided with a 25 invention, the work holder comprises coopbracket 4 having secured thereto the usual crating fixed and movable clampin aws curved track 5 which controls the elevation which are mounted on the usual jac in a of the jack J of the machine with relationv s0 manner to be swung about the cutter memto the cutters 3. The jack is provided with hers in a predetermined path to properly astem 6 rotatably supported in upright poshape the back and sides of the wood heel sition by bearings formed upon a hen 7 block. The movable clamping jaw is moved wh ch in turn is pivotally connected through into clamping position by a pneuniaticallyan upright shaft 8 to lugs projecting from 35 operated mechanism which functions to the machine frame. At its lower end the clamp the heel block with a minimum of stem 6 is provided with a shoe 18 which 35 time and effort on the part of the operator. rests upon the cam track 5, and at its up- The simple manipulation of a valve, admitper end the stem is provided with a yoke 9 ting fluid pressure to the mechanism, moves to which the jack lever 11 is pivotally oonthe jaw into operative position. The second nected at 10. The lever 11 rests upon a secmovement of the valve to release the pres 0nd cam track 12 which is secured to a sure rmits the clamping ja-w to be disenbracket 13 mounted on the machine frame. gage by spring mec an sm. lngorder to The cam track 12 serves tomaintain the jack exert the r uisite clam mg pressure upon lever 11 at the proper angle relative to the the heel bloc without t e. necessity of enicutters 3, and to va this angle during the ploying exceedingly high fluid pressures or cutting operation. e lever 11 is provided 45 large areas in contact therewith, the present with a workrest 14, and the work-positioninvention contemplates the use of a toggle ing gage 15 is indicated in Fig. 1 for de-, directly connected to the movable jaw and termining the position of the heel block B, connected intermediate its ends with a pneu- As indicated, the workrest 14 forms the matically perated piston. With this confixed jaw of the work holder. Adjustably 60 struction the fluid pressure directed behind sescured to opposite sides of the lever 11 are the piston exerts a powerful clamping presupright bars 17, between which is arranged sure upon the jaw through the medium of a movable clamping aw 16 pivotallyconthe toggle. I I nected with the arm ts 17. The movable of the member clamping jaw is moved into operative relation to the heel block by mechanism hereinafter described. After the clamping of the heel block in place, the operator swings the jack J through the usual handle in a manner to bring the heel block first into engagement with one cutter and then the other, the jack being rotated about the spindle 6 during engagement with each cutter. Connected to the upper ends of the bars 17 is a cylinder 19, within which is slidingly su ported a piston 20 connected to a piston rod 21 extending through the end wall of the cylinder. The free end of the piston rod is in turn connected through a pin-andslot connection with the upper end of one member 22 of a toggle lever, the lower end being pivotally connected to the clamping jaw 16, as indicated in Fig. 1. The cooperating member 23 of the toggle consists of a bifurcated lever embracing the member 22 and pivotally connected to the latter below the connection with the piston rod 21 the upper end of the member 23 is pivotally connected to an extension 19 projecting from the end of the cylinder 19. Extending upwardly from the extension 19 and formed integral therewith is a handle 24 which in conjunction with the handle 25 serves to the jack. The control of the piston 20 in order to operate the movable clamping jaw is provided by a port 26 located adjacent to one end of the cylinder 19 and connected by a conduit or pipe 27 with a passage 28 in the body of a three-way valve 29. The passage 28 communicates with a valve chamber within which is positioned a valve 30 having a transverse passage 32, which in one posi tion of the valve is adapted to register at opposite ends with the passage 28 and a second passage 33 leading to the atmosphere, and in another position of the valve to leg ister with the passage 28 and a passage 34 communicating with a source of fiuid pressure through a conduit 35. In a third position of the valve, as indicated in Fig. 5, the passage 27 is closed against either the supply or release of fluid pressure. The valve is normally retained in engagement with its seat by a spring 36, and is manipulated in different positions by a handle 37 which is in a position to be conveniently engaged by the thumb of the operator, as indicated more particularly in Fig. 1. As will be apparent to those skilled in the art, when the fluid pressure cylinder is connected with the supply pipe 34, air under pressure is admitted thereto and forces the piston 20 in a direction to straighten the toggleand move the clamping jaw 16 into operative position. On completion of the work, a valve is moved to exhaust the release ressure behind the piston and a spring 37 t ereupon moves the permit the desired manipulation ofpiston to the left to break the toggle and raise the clamping holder during the shaping operation. It

will be obvious to those skilled in the art that certain features of the present invention are not limited in their application to wood heel turning, but could be equally well embodied in other machines having slmilar requirements and characteristics of operation.

What is claimed is:

A machine for shaping wood heels comprising a work rest, a movable clamping aw cooperating therewith, pneumaticallyoperated toggle mechanism for moving the clamping jaw into work-engaging position, and means under the control of the operator for governing the movements of the toggle mechanism.

2. machine for shaping wood heels comprising cooperating clamping jaws constituting a work holder, a pneumaticallyoperated toggle mechanism connected with one of the jaws to move the jaw into workengaging position, and a spring for instantly returning the movable jaw to inoperative position upon release of the pneumatic pressure. a

A machine for shaping wood heels comprising a work rest, a movable clamping jaw cooperating therewith, pneumatically-open ated toggle mechanism for moving the clamping jaw into work-engaging position, yielding means for returning the clamping aw to inoperative position, and a control valve connected with the pneumatic 1nechanism in a manner to place the movements of the clamping jaw under the direct control of the operator.

e t. A machine of the class described comprising astationary work rest, a pivoted clamping aw cooperating therewith, a toggle connected with the jaw, a cylinder, 9. piston sliding within the cylinder directly connected with the toggle intermediate its ends, means for normally moving the piston in a direction to break the toggle and and release the clamping jaw, and means for admitting fluid pressure behind the piston to move the latter in a direction to straighten the toggle and move the clamping jaw into work-engaging position.

{3. A machine of the class described comprising a sta'tionary work rest, a pivoted clamping aw cooperating therewith, a toggle connected with the jaw, a cylinder, a

piston I sliding within the cylinder directly connected with the toggle intermediate its ends,

means for normally moving the piston in a direction to break the toggle and re- 5 lease the clamping jaw, means for admittoggle and move the clamping jaw into work-engaging position, and a. control valve adapted to be actuated in a manner to apl0 ply or release fluid pressure from behind the piston.

4 In testimony whereof I have signed my name to this specification.

NICHOLAS L. GULLIFORD. 

